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(N0 ModeL) W. H. CLARK. KEY LOCKING AND KEY COUPLING MECHANISM FOR GASH REGISTERS. No.- 496 340. Patented Apr. 25, 1893.

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UNITED STATES PATENT OFFICE.

\VILLIAM H. CLARK, OF ERIE, PENNSYLVANIA, ASSIGNOR TO THE ERIE CASH REGISTER COMPANY, OF SAME PLACE.

KEY-LOCKING AND KEY-COUPLING MECHANISM FOR CASH-REGISTERS.

SPECIFICATION forming part of Letters Patent No. 496,340, dated April 25, 1893. Application filed August 8, 1892. Serial No. 442,535. (No model.)

To ctZZ whom it may concern. distance below the rod C upon which the key- 50 Be it known that I, WILLIAM H. CLARK, a levers D operate,I pivot levers H H, the ends citizen of the United States, residing in the of the arms I, of said levers being connected city of Erie, in the county of Erie and State of together bya rod J which when the key-levers 5 Pennsylvania, have invented certain new and are in their normal positions is directly under usefullmprovementsinKey-Lockingand Keythe lower edges M of the front portions, of the 55 Coupling Mechanism for Cash-Registers; and key-levers D, so that the depression of any of I do hereby declare the following to be a full, the key-levers operates also to depress the clear, and exact description of the invention, ends I of the levers H. The ends K of the lesuch as will enable others skilled in the art to vers II extend out slightly beyond and below which it appertains to make and use the same, the lower ends of the cam shaped projections 50 reference being had to the accompanying G, on the rear sections F of the key-levers D, drawings, and to the letters of reference Where they are connected together by means marked thereon, forming part of this specifiof a rod L, which rod L is adapted to pass up cation. over the faces of the cams G, when the end I Myinvention consists in the improvements of said lever H is depressed,so that in opera- 6 in cash-register key lever locking and couption when one of the key-levers D is depressed ling mechanism hereinafter set forth and eX- the end of the cam G thereon is moved upplained and illustrated in the accompanying ward over the rod L which follows it closely,

2o drawings in which: traveling up over the remainder of the cams Figure 1. is a top or plan view of my im- G, so as to prevent their being moved until 70 proved cash-register key-lever locking and the key-leverfirst moved returns to its normal coupling mechanism. Fig. 2. is a transverse position, and the like etfectis produced when vertical section of same on the line 00, 0c, in two or more key-levers are simultaneously de- Fig. 1. Fig. 3. is a like verticalsection of same pressed. Thus my device operates both as a illustrating the operation thereof. key lever lock, and as a key-lever coupling 75 The principal object of my invention is to device. I have not described the other feaprovide a key lever locking and coupling tures of a cash-register as they form no part mechanism for cash-registers, so constructed of my invention, it being equally applicable 0 that the depression of any one of the keys operto all forms of cash-registers using key-levers ates to look all of the remaining key-levers in for operating them. 80 their normal positions. WVhen however, two Having thus fully described my invention, or more of the key-levers are simultaneously so as to enable others to construct and use started they can all be moved in unison, the the same, what I claim as new, and desire to remaining key-levers being locked in their secure by Letters Patent of the United States,

normal positions until the keys moved have is 5 returned to their normal positions. I. The combination in a key-locking and In the construction of my invention shown key coupling mechanism for cash-registers, of in the drawings, A A are the sides of the base key-levers and cams on said key-levers, with of the machine frame, connected together by levers pivoted to the machine frame, and conmeans of a rod B. On a rod C, I mount keynected by a rod at their front ends contacting o leversD in the usual manner,these key levers with all of the key-levers, and a rod at their being provided on their outer ends with the rear ends adapted to contact with the cams usual operating knobs or buttons E. On the on the key-levers, substantially as and for the under sides of the rear portions F of these purpose set forth.

key levers D, I make cam shaped extensions 2. The combination in a key-locking and 5 G which project downward some distance as key-coupling device for cash-registers, of cenand for the purpose hereinafter set forth. trally pivoted key-levers, and downwardly To the sidesAAof the machine frame, some projecting cams on the rear portions of the key-levers, with levers pivoted to the machine levers, substantially as and for the purpose frame below the axes of the key-levers, a rod set forth. :0 connecting their front ends and contacting In testimony whereof I affix my signature in when in its normal position, with the under presence of two Witnesses.

5 sides of the front sections of all of the key- WVILLIAM H. CLARK.

levers, and a rod connecting the rear ends of Witnesses: said levers adapted to contact when raised F. EINFELDT,

with the cams on the rear portions of the key- \VM. P. HAYES. 

